In many ways the first world war saw the death of the old word, and the birth of the new.
With out dated tactics such as cavalry and dress uniforms rapidly giving way to tanks, camouflage and gas attacks, the armies of the world looked very different by 1918 when compared to 1914.
To cope with the horrors of trench warfare and modern weaponry, the soldiers on the ground had to come up with new, ingenious, and often unusual weapons to eek out some advantage over their enemies.
Here are 5 of the more unusual yet inventive weapons that saw action on the deadly battlefields of world war one.
5. Aircraft Sound Detection
4. The Drip Rifle
3. The Mobile Shield
2. The Periscope Rifle
1. The Gauntlet Dagger
